UM3510中文资料1A，2.25MHz，同步降压型DC-DC转换器数据手册Union-IC规格书

描述 Description

The UM3510 is a high efficiency pulse-width-modulated (PWM) synchronous step-down DC-DC converter with an input voltage range of 2.5V to 6.0V. It provides up to 1000mA output current from a single Li-ion cell. The UM3510 operates at 2.25MHz fixed switching frequency and enters Power Save Mode to maintain high efficiency at light load condition.

For low noise applications, the device can be forced into fixed frequency PWM mode by pulling the MODE pin high.

The UM3510 enters shutdown mode and consumes less than 1μA when EN pin is pulled low. Other features include lower internal reference voltage with 2% accuracy, over temperature protection and over current protection.

The UM3510 is available in SOT23-6 and 2mm×2mm 6-pin DFN packages.

特性 Features

- High Efficiency: Up to 95%
- 2.25MHz Constant Switching Frequency
- 1000mA Output Current
- Integrated Main Switch and Synchronous Rectifier. No Schottky Diode Required.
- 2.5V to 6.0V Input Voltage Range
- Low Quiescent Current: 56µA
- Thermal Fault Protection
- <1µA Shutdown Current

应用 Application

- Cellular and Smart Phones
- Microprocessors and DSP Core Supplies
- Wireless and DSL Modems
- PDAs, GPS
- WLAN
- Portable Instruments